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Humayun M, Shu L, Pi W, Xia H, Khan A, Zheng Z, Fu Q, Tian Y, Luo W. Vertically grown CeO 2 and TiO 2 nanoparticles over the MIL53Fe MOF as proper band alignments for efficient H 2 generation and 2,4-DCP degradation. Environ Sci Pollut Res Int 2022; 29:34861-34873. [PMID: 35041166 DOI: 10.1007/s11356-022-18684-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 01/11/2022] [Indexed: 06/14/2023]
Abstract
The design of highly efficient photoca talysts for clean energy production and environmental remediation are the grand challenges of scientific research. Herein, TiO2@MIL53Fe and CeO2@MIL53Fe composite photocatalysts are synthesized via solvothermal technique. The SEM and TEM micrographs reveal that TiO2 and CeO2 nanoparticles are vertically grown onto the surface of MIL53Fe MOF. Further, HRTEM micrograph confirmed the formation of heterojunction. It has been investigated that the resultant TiO2@MIL53Fe and CeO2@MIL53Fe photocatalysts exhibit remarkably improved visible light activities for H2 production and 2,4-dichlorophenol (2,4-DCP) degradation in comparison to the bare MIL53Fe photocatalyst. The enhanced photoactivities of the fabricated TiO2@MIL53Fe and CeO2@MIL53Fe photocatalysts are attributed to significantly promoted charge separation as confirmed via the surface photo voltage (SPV) and photoluminescence (PL) results. Further, the photocatalysts exhibit high stability and reusability as confirmed via the recyclable tests. This work will promote the design of MOF-based efficient photocatalysts for clean energy production and environment purification.
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Affiliation(s)
- Muhammad Humayun
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Lang Shu
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Wenbo Pi
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Hui Xia
- Institute of Electrical Engineering, Chinese Academy of Sciences, No. 6 Beiertiao, Zhongguancun, Beijing, 100190, China.
| | - Abbas Khan
- Department of Chemistry, Abdul Wali Khan University Mardan, Mardan, KP, 23200, Pakistan
| | - Zhiping Zheng
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Qiuyun Fu
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Yahui Tian
- Institute of Acoustics, Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Wei Luo
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China.
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China.
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Zhang Y, Yu J, Liu G, Jin X, Liu R, Du J, Xue W. Degradation of 2,4-dichlorophenol by cathodic microarc plasma electrolysis: characteristics and mechanisms. Environ Technol 2022; 43:572-584. [PMID: 32674672 DOI: 10.1080/09593330.2020.1797896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 06/11/2020] [Indexed: 06/11/2023]
Abstract
In this work, we used cathodic microarc plasma electrolysis (CMPE) to degrade 2,4-dichlorophenol (2,4-DCP) in simulated wastewater. By investigating and comparing the removal efficiencies and chemical oxygen demand (COD) during the degradation process, higher bath voltage and alkaline condition were considered as more suitable for the 2,4-DCP decomposition. Higher initial 2,4-DCP concentration was attributed to the increase in the utilisation of the energy input. The plasma characteristics during CMPE were studied by optical emission spectroscopy (OES). It was found that the 2,4-DCP directly participated in the plasma discharge process. Furthermore, by studying the evolution of intermediate products at different experimental parameters, it was found that the existence of Cl- played an important role in the opening of benzene ring, which activated the ortho-substitutions of hydroxyl, meanwhile accelerated the p-substitutions. The instantaneous high temperature and high pressure and the Cl- that were generated and driven by cathodic plasma made the decomposition of 2,4-DCP much quicker.
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Affiliation(s)
- Yifan Zhang
- Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing, People's Republic of China
- Beijing Radiation Center, Beijing, People's Republic of China
| | - Jiahao Yu
- Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing, People's Republic of China
- Beijing Radiation Center, Beijing, People's Republic of China
| | - Guijun Liu
- Beijing Radiation Center, Beijing, People's Republic of China
| | - Xiaoyue Jin
- Beijing Radiation Center, Beijing, People's Republic of China
| | - Ruihong Liu
- Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing, People's Republic of China
- Beijing Radiation Center, Beijing, People's Republic of China
| | - Jiancheng Du
- Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing, People's Republic of China
- Beijing Radiation Center, Beijing, People's Republic of China
| | - Wenbin Xue
- Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing, People's Republic of China
- Beijing Radiation Center, Beijing, People's Republic of China
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Chris Felshia S, AshwinKarthick N, Thilagam R, Gnanamani A. Elucidation of 2, 4-Dichlorophenol degradation by Bacillus licheniformis strain SL10. Environ Technol 2020; 41:366-377. [PMID: 30010506 DOI: 10.1080/09593330.2018.1498923] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 07/01/2018] [Indexed: 06/08/2023]
Abstract
2,4-Dichlorophenol (2,4-DCP) is a priority pollutant according to US Environmental Protection Agency. Its use in various chemical industries and its presence in the effluent necessitate effective removal studies. The present study focuses on degradation of 2,4-DCP by phenol adapted bacteria Bacillus licheniformis strain SL10 (MTCC 25059) at a relatively faster rate. The organism exhibited tolerance to 150 ppm of 2,4-DCP and showed a linear relationship between the growth and substrate concentration (µmax 0.022/h) and the inhibitory concentration was 55.74 mg/L. The degradation efficiency of the organism was 74% under optimum conditions but increased to 97% when the growth medium containing nil sodium chloride. The degradation of 2,4-DCP was effected by the action of extracellular cocktail enzyme containing Catechol 2, 3 dioxygenase (C23DO), phenol hydroxylase and Catechol, 1,2 dioxygenase (C12DO). In vitro enzymatic degradation studies exhibit 98% degradation of 50 ppm of 2,4-DCP within 2 h. Analyses of degradation products infer that the chosen organism followed a meta-cleavage pathway while degrading 2,4-DCP. In conclusion, the bacteria Bacillus licheniformis strain SL10 finds potential application in the remediation of 2,4-DCP.
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Affiliation(s)
| | | | - R Thilagam
- CSIR-Central Leather Research Institute, Chennai, India
| | - A Gnanamani
- CSIR-Central Leather Research Institute, Chennai, India
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